MUDR-387 Hot Spring Gang Rape Trip: A town girl, Aoba Haru, is repeatedly and intensely raped by ugly, middle-aged men, leaving her with unforgettable memories.

The annual hot spring trip, meant to strengthen bonds within the town, is once again a must-do for Haru, the area's most beautiful girl. However, her father, who always accompanies her, is unable to go due to work, leaving her to accompany the group alone as a caregiver. Having known the local older men since childhood, the innocent Haru has no suspicion of them. However, these unsightly men, lusting after the grown-up beauty they've known since childhood, exploit Haru's naivety and begin to repeatedly sexually harass her…